I've got a 91 YJ 2.5 with a huge wiring mess in the PDC and Relays.
To make a long story short, I was having as issue with not starting so I was checking the Relays. By removing the relays,(Fuel Pump, ASD, and Starter) some of the wires came out of the terminal side.
Since it was a big mess, I decided I should try to re-wire it.
According to diagrams I was able to find online, my 3 relays were not even installed in the correct slots in the PDC.
I have downloaded the manual from AllData and have the PDC/Relay wiring diagram.
Problem now is that the wires don't appear to be correct. They come out of the firewall, then split into fusible links?...(blue colored crimped connectors)..then go to the PDC.
Well, the wires on the harness(before blue connector) side are all a different color then the wire on the other side of the blue connector.
For instance..I would have brown wire..blue connector..then pink/yellow wire.
So now I can't tell what wire is supposed to be what or supposed to go where.
I assume this is not normal?
Any help is greatly appreciated!!
Your going to have to go with the color wiring coming out of the firewall or do a circuit by circuit check with a meter to figure out what circuit goes to each. It really shouldnt be that bad if its just the 3 relays. I take it you are dealing with the Fuel pump, ASD and the Horn relays?
X2^^^ THey are comonly called butt splices. They are used when you cut a wire and want to splice it back together or connect a longer wire.
A fusable link is a smaller guage wire so that it will burn in 2 before the actual wiring or equipment it's inline with burn up..
One of the PO's definetly left you a mess.
You may be better off finding a donor to get the complete harness replaced.
Definitely will save you alot of time and headaches.
Fhajad, that's what I figured...just doesn't make sense the way it is wired..really surprised it ran in the first place, thought it didn't run great.
Que89yj...the only three relays I have are the Starter, Fuel Pump, and ASD.
There are slots for other relays,,but they were not wired up.
The relays that were there were not even in the correct slots according to the PDC diagram..they were just all together in the middle.
I'm not really sure about how to do a circuit by circuit check..I do have a meter.
Any insight would be great!
All you need to do is use the diagram from all data. The wire coloring coming through the bulhead is the correct color. Rewire the connections to the relays using it. There should only be 12 wires total.
I guess I'm asking if anyone can tell me if this diagram is correct? I don't have a FSM. I am probably going to sell this one after I get it running right...Wife wants a newer model. Will certainly get a FSM for that one!
Last edited by sirfoulsalot; 06-21-2010 at 03:13 PM..
Those are the same diagrams I have.
I wired it up yesterday according to the diagram and using the wire colors from before the connectors. I am missing the pink/yellow wires but I believe I figured out the correct substitute.
And nothing...starter turns over but it still wont crank. I'm not even getting a spark now (I was before).
The entire jeep seems dead now...nothing will come on at all..(no blower fan, radio..etc)
Not getting any center gauge lights either..ie check engine light is not coming on.
Checked all fuses and they are okay.
Guess this means my ECU is fried?
The PO installed a push button style ignition/start switch that is wired directly to the starter.
Turn key on and press button...
Must have been something wrong with stock ignition/key.
Think this might have something to do with it?
Don't know how I missed it before, but fuse 6 was blown...replaced it and it started right up. I guess I finally got it wired up right and the stars above aligned just right!!
Thanks for all your help!!
This forum is awesome and has answered soooo many questions on many different occasions.